3 * Martin Winistoerfer, martinwinistoerfer@gmx.ch.
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 * Discription: This Driver is for 28F320J3A, 28F640J3A and
28 * 28F128J3A Intel flashs working in 16 Bit mode.
29 * They are single bank flashs.
31 * Most of this code is taken from existing u-boot
39 #if defined(CFG_ENV_IS_IN_FLASH)
41 # define CFG_ENV_ADDR (CFG_FLASH_BASE + CFG_ENV_OFFSET)
44 # define CFG_ENV_SIZE CFG_ENV_SECT_SIZE
46 # ifndef CFG_ENV_SECT_SIZE
47 # define CFG_ENV_SECT_SIZE CFG_ENV_SIZE
51 #define FLASH_ID_MASK 0xFFFF
52 #define FLASH_BLOCK_SIZE 0x00010000
53 #define FLASH_CMD_READ_ID 0x0090
54 #define FLASH_CMD_RESET 0x00ff
55 #define FLASH_CMD_BLOCK_ERASE 0x0020
56 #define FLASH_CMD_ERASE_CONFIRM 0x00D0
57 #define FLASH_CMD_CLEAR_STATUS 0x0050
58 #define FLASH_CMD_SUSPEND_ERASE 0x00B0
59 #define FLASH_CMD_WRITE 0x0040
60 #define FLASH_CMD_PROTECT 0x0060
61 #define FLASH_CMD_PROTECT_SET 0x0001
62 #define FLASH_CMD_PROTECT_CLEAR 0x00D0
63 #define FLASH_STATUS_DONE 0x0080
65 flash_info_t flash_info[CFG_MAX_FLASH_BANKS];
68 * Local function prototypes
70 static ulong flash_get_size (vu_short *addr, flash_info_t *info);
71 static int write_short (flash_info_t *info, ulong dest, ushort data);
72 static void flash_get_offsets (ulong base, flash_info_t *info);
78 unsigned long flash_init (void)
80 unsigned long size_b0;
83 /* Init: no FLASHes known */
84 for (i=0; i<CFG_MAX_FLASH_BANKS; ++i) {
85 flash_info[i].flash_id = FLASH_UNKNOWN;
88 /* Static FLASH Bank configuration here - FIXME XXX */
90 debug ("\n## Get flash bank 1 size @ 0x%08x\n",FLASH_BASE0_PRELIM);
92 size_b0 = flash_get_size((vu_short *)FLASH_BASE0_PRELIM, &flash_info[0]);
94 if (flash_info[0].flash_id == FLASH_UNKNOWN) {
95 printf ("## Unknown FLASH on Bank 0: "
96 "ID 0x%lx, Size = 0x%08lx = %ld MB\n",
97 flash_info[0].flash_id,
98 size_b0, size_b0<<20);
101 flash_get_offsets (FLASH_BASE0_PRELIM, &flash_info[0]);
103 flash_info[0].size = size_b0;
105 #if CFG_MONITOR_BASE >= CFG_FLASH_BASE
106 /* monitor protection ON by default */
107 flash_protect(FLAG_PROTECT_SET,
109 CFG_MONITOR_BASE+monitor_flash_len-1,
113 #ifdef CFG_ENV_IS_IN_FLASH
114 /* ENV protection ON by default */
115 flash_protect(FLAG_PROTECT_SET,
117 CFG_ENV_ADDR+CFG_ENV_SECT_SIZE-1,
125 * Compute start adress of each sector (block)
128 static void flash_get_offsets (ulong base, flash_info_t *info)
132 if (info->flash_id == FLASH_UNKNOWN) {
136 switch (info->flash_id & FLASH_VENDMASK) {
137 case FLASH_MAN_INTEL:
138 for (i = 0; i < info->sector_count; i++) {
139 info->start[i] = base + i * FLASH_BLOCK_SIZE;
144 printf ("Don't know sector offsets for flash type 0x%lx\n",
151 * Print flash information
153 void flash_print_info (flash_info_t *info)
157 if (info->flash_id == FLASH_UNKNOWN) {
158 printf ("missing or unknown FLASH type\n");
162 switch (info->flash_id & FLASH_VENDMASK) {
163 case FLASH_MAN_AMD: printf ("AMD "); break;
164 case FLASH_MAN_FUJ: printf ("Fujitsu "); break;
165 case FLASH_MAN_SST: printf ("SST "); break;
166 case FLASH_MAN_STM: printf ("STM "); break;
167 case FLASH_MAN_INTEL: printf ("Intel "); break;
168 case FLASH_MAN_MT: printf ("MT "); break;
169 default: printf ("Unknown Vendor "); break;
172 switch (info->flash_id & FLASH_TYPEMASK) {
173 case FLASH_28F320J3A: printf ("28F320J3A (32Mbit) 16-Bit\n");
175 case FLASH_28F640J3A: printf ("28F640J3A (64Mbit) 16-Bit\n");
177 case FLASH_28F128J3A: printf ("28F128J3A (128Mbit) 16-Bit\n");
179 default: printf ("Unknown Chip Type\n");
183 if (info->size >= (1 << 20)) {
188 printf (" Size: %ld %cB in %d Sectors\n",
190 (i == 20) ? 'M' : 'k',
193 printf (" Sector Start Addresses:");
194 for (i=0; i<info->sector_count; ++i) {
199 info->protect[i] ? " (RO)" : " "
207 * Get size of flash in bytes.
208 * The following code cannot be run from FLASH!
211 static ulong flash_get_size (vu_short *addr, flash_info_t *info)
215 /* Read Manufacturer ID */
216 addr[0] = FLASH_CMD_READ_ID;
220 case (AMD_MANUFACT & FLASH_ID_MASK):
221 info->flash_id = FLASH_MAN_AMD;
223 case (FUJ_MANUFACT & FLASH_ID_MASK):
224 info->flash_id = FLASH_MAN_FUJ;
226 case (SST_MANUFACT & FLASH_ID_MASK):
227 info->flash_id = FLASH_MAN_SST;
229 case (STM_MANUFACT & FLASH_ID_MASK):
230 info->flash_id = FLASH_MAN_STM;
232 case (INTEL_MANUFACT & FLASH_ID_MASK):
233 info->flash_id = FLASH_MAN_INTEL;
236 info->flash_id = FLASH_UNKNOWN;
237 info->sector_count = 0;
239 addr[0] = FLASH_CMD_RESET; /* restore read mode */
240 return (0); /* no or unknown flash */
243 value = addr[1]; /* device ID */
246 case (INTEL_ID_28F320J3A & FLASH_ID_MASK):
247 info->flash_id += FLASH_28F320J3A;
248 info->sector_count = 32;
249 info->size = 0x00400000;
250 break; /* => 32 MBit */
252 case (INTEL_ID_28F640J3A & FLASH_ID_MASK):
253 info->flash_id += FLASH_28F640J3A;
254 info->sector_count = 64;
255 info->size = 0x00800000;
256 break; /* => 64 MBit */
258 case (INTEL_ID_28F128J3A & FLASH_ID_MASK):
259 info->flash_id += FLASH_28F128J3A;
260 info->sector_count = 128;
261 info->size = 0x01000000;
262 break; /* => 128 MBit */
265 info->flash_id = FLASH_UNKNOWN;
266 addr[0] = FLASH_CMD_RESET; /* restore read mode */
267 return (0); /* => no or unknown flash */
271 if (info->sector_count > CFG_MAX_FLASH_SECT) {
272 printf ("** ERROR: sector count %d > max (%d) **\n",
273 info->sector_count, CFG_MAX_FLASH_SECT);
274 info->sector_count = CFG_MAX_FLASH_SECT;
277 addr[0] = FLASH_CMD_RESET; /* restore read mode */
284 * Erase unprotected sectors
287 int flash_erase (flash_info_t *info, int s_first, int s_last)
289 int flag, prot, sect;
290 ulong start, now, last;
292 if ((s_first < 0) || (s_first > s_last)) {
293 if (info->flash_id == FLASH_UNKNOWN) {
294 printf ("- missing\n");
296 printf ("- no sectors to erase\n");
301 if ((info->flash_id & FLASH_VENDMASK) != FLASH_MAN_INTEL) {
302 printf ("Can erase only Intel flash types - aborted\n");
307 for (sect=s_first; sect<=s_last; ++sect) {
308 if (info->protect[sect]) {
314 printf ("- Warning: %d protected sectors will not be erased!\n",
320 start = get_timer (0);
323 /* Start erase on unprotected sectors */
324 for (sect = s_first; sect<=s_last; sect++) {
325 if (info->protect[sect] == 0) { /* not protected */
326 vu_short *addr = (vu_short *)(info->start[sect]);
327 unsigned long status;
329 /* Disable interrupts which might cause a timeout here */
330 flag = disable_interrupts();
333 printf("Erase sector %d at start addr 0x%08X", sect, (unsigned int)info->start[sect]);
336 *addr = FLASH_CMD_CLEAR_STATUS;
337 *addr = FLASH_CMD_BLOCK_ERASE;
338 *addr = FLASH_CMD_ERASE_CONFIRM;
340 /* re-enable interrupts if necessary */
344 /* wait at least 80us - let's wait 1 ms */
347 while (((status = *addr) & FLASH_STATUS_DONE) != FLASH_STATUS_DONE) {
348 if ((now=get_timer(start)) > CFG_FLASH_ERASE_TOUT) {
349 printf("Flash erase timeout at address %lx\n", info->start[sect]);
350 *addr = FLASH_CMD_SUSPEND_ERASE;
351 *addr = FLASH_CMD_RESET;
355 /* show that we're waiting */
356 if ((now - last) > 1000) { /* every second */
361 *addr = FLASH_CMD_RESET;
369 * Copy memory to flash, returns:
372 * 2 - Flash not erased
373 * 4 - Flash not identified
376 int write_buff (flash_info_t *info, uchar *src, ulong addr, ulong cnt)
382 if (info->flash_id == FLASH_UNKNOWN) {
386 wp = (addr & ~1); /* get lower word aligned address */
389 * handle unaligned start byte
394 data = (data << 8) | *src++;
396 if ((rc = write_short(info, wp, data)) != 0) {
403 * handle word aligned part
408 for (i=0; i<2; ++i) {
409 data = (data << 8) | *src++;
412 if ((rc = write_short(info, wp, data)) != 0) {
424 * handle unaligned tail bytes
428 for (i=0, cp=wp; i<2 && cnt>0; ++i, ++cp) {
429 data = (data << 8) | *src++;
432 for (; i<2; ++i, ++cp) {
433 data = (data << 8) | (*(uchar *)cp);
436 return (write_short(info, wp, data));
441 * Write 16 bit (short) to flash
444 static int write_short (flash_info_t *info, ulong dest, ushort data)
446 vu_short *addr = (vu_short*)(info->start[0]);
450 /* Check if Flash is (sufficiently) erased */
451 if ((*((vu_short *)dest) & data) != data) {
455 /* Disable interrupts which might cause a timeout here */
456 flag = disable_interrupts();
458 if (!(info->flash_id & FLASH_VENDMASK)) {
461 *addr = FLASH_CMD_ERASE_CONFIRM;
462 *addr = FLASH_CMD_WRITE;
464 *((vu_short *)dest) = data;
466 /* re-enable interrupts if necessary */
471 /* data polling for D7 */
472 start = get_timer (0);
474 /* wait for error or finish */
475 while(!(addr[0] & FLASH_STATUS_DONE)){
476 if (get_timer(start) > CFG_FLASH_WRITE_TOUT) {
477 addr[0] = FLASH_CMD_RESET;
482 *addr = FLASH_CMD_RESET;
487 * Protects a flash sector
490 int flash_real_protect(flash_info_t *info, long sector, int prot)
492 vu_short *addr = (vu_short*)(info->start[sector]);
495 *addr = FLASH_CMD_CLEAR_STATUS;
496 *addr = FLASH_CMD_PROTECT;
499 *addr = FLASH_CMD_PROTECT_SET;
501 *addr = FLASH_CMD_PROTECT_CLEAR;
504 /* wait for error or finish */
505 start = get_timer (0);
506 while(!(addr[0] & FLASH_STATUS_DONE)){
507 if (get_timer(start) > CFG_FLASH_ERASE_TOUT) {
508 printf("Flash protect timeout at address %lx\n", info->start[sector]);
509 addr[0] = FLASH_CMD_RESET;
513 /* Set software protect flag */
514 info->protect[sector] = prot;
515 *addr = FLASH_CMD_RESET;